package com.notice.qrcode;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.text.DateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.EnumSet;
import java.util.Map;
import java.util.Set;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceManager;
import android.text.ClipboardManager;
import android.util.Log;
import android.util.TypedValue;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;
import com.google.zxing.ResultMetadataType;
import com.google.zxing.ResultPoint;
import com.notice.camera.CameraManager;
import com.notice.history.HistoryActivity;
import com.notice.history.HistoryItem;
import com.notice.history.HistoryManager;
import com.notice.resulthandler.ResultHandler;
import com.notice.resulthandler.ResultHandlerFactory;

/**
 * This activity opens the camera and does the actual scanning on a background
 * thread. It draws a viewfinder to help the user place the barcode correctly,
 * shows feedback as the image processing is happening, and then overlays the
 * results when a scan is successful.
 * 
 */
public final class CaptureActivity extends Activity implements
		SurfaceHolder.Callback {

	private static final String TAG = CaptureActivity.class.getSimpleName();

	private static final int HISTORY_ID = Menu.FIRST + 1;
	private static final long DEFAULT_INTENT_RESULT_DURATION_MS = 1500L;
	private static final long BULK_MODE_SCAN_DELAY_MS = 1000L;

	private static final String RETURN_CODE_PLACEHOLDER = "{CODE}";
	public static final int HISTORY_REQUEST_CODE = 0x0000bacc;

	private static final Set<ResultMetadataType> DISPLAYABLE_METADATA_TYPES = EnumSet
			.of(ResultMetadataType.ISSUE_NUMBER,
					ResultMetadataType.SUGGESTED_PRICE,
					ResultMetadataType.ERROR_CORRECTION_LEVEL,
					ResultMetadataType.POSSIBLE_COUNTRY);

	private CameraManager cameraManager;
	private CaptureActivityHandler handler;
	private Result savedResultToShow;
	private ViewfinderView viewfinderView;
	private TextView statusView;
	private View resultView;
	private Result lastResult;
	private boolean hasSurface;
	private boolean copyToClipboard;
	private IntentSource source;
	private String sourceUrl;
	private String returnUrlTemplate;
	private Collection<BarcodeFormat> decodeFormats;
	private String characterSet;
	private HistoryManager historyManager;
	private InactivityTimer inactivityTimer;
	private BeepManager beepManager;
	private ToggleButton tb;
	private boolean tb_checked;

	private static final String MTAG = "capture";

	// private final DialogInterface.OnClickListener aboutListener =
	// new DialogInterface.OnClickListener() {
	// @Override
	// public void onClick(DialogInterface dialogInterface, int i) {
	// Intent intent = new Intent(Intent.ACTION_VIEW,
	// Uri.parse(getString(R.string.zxing_url)));
	// intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
	// startActivity(intent);
	// }
	// };

	ViewfinderView getViewfinderView() {
		return viewfinderView;
	}

	public Handler getHandler() {
		return handler;
	}

	CameraManager getCameraManager() {
		return cameraManager;
	}

	@Override
	public void onCreate(Bundle icicle) {
		super.onCreate(icicle);

		Window window = getWindow();
		window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
		setContentView(R.layout.capture);

		tb = (ToggleButton) findViewById(R.id.tb_lianxu);
		tb.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				tb_checked = tb.isChecked();
			}
		});
		tb.setVisibility(View.VISIBLE);
		hasSurface = false;
		historyManager = new HistoryManager(this);
		historyManager.trimHistory();
		inactivityTimer = new InactivityTimer(this);
		beepManager = new BeepManager(this);

		PreferenceManager.setDefaultValues(this, R.xml.preferences, false);

		// showHelpOnFirstLaunch();
	}

	@Override
	protected void onResume() {
		super.onResume();

		// CameraManager must be initialized here, not in onCreate(). This is
		// necessary because we don't
		// want to open the camera driver and measure the screen size if we're
		// going to show the help on
		// first launch. That led to bugs where the scanning rectangle was the
		// wrong size and partially
		// off screen.
		cameraManager = new CameraManager(getApplication());

		viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
		viewfinderView.setCameraManager(cameraManager);

		resultView = findViewById(R.id.result_view);
		statusView = (TextView) findViewById(R.id.status_view);

		handler = null;
		lastResult = null;

		resetStatusView();

		SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
		SurfaceHolder surfaceHolder = surfaceView.getHolder();
		if (hasSurface) {
			// The activity was paused but not stopped, so the surface still
			// exists. Therefore
			// surfaceCreated() won't be called, so init the camera here.
			initCamera(surfaceHolder);
		} else {
			// Install the callback and wait for surfaceCreated() to init the
			// camera.
			surfaceHolder.addCallback(this);
			surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		}

		beepManager.updatePrefs();

		inactivityTimer.onResume();

		Intent intent = getIntent();

		SharedPreferences prefs = PreferenceManager
				.getDefaultSharedPreferences(this);
		copyToClipboard = prefs.getBoolean(
				PreferencesActivity.KEY_COPY_TO_CLIPBOARD, true)
				&& (intent == null || intent.getBooleanExtra(
						Intents.Scan.SAVE_HISTORY, true));

		source = IntentSource.NONE;
		decodeFormats = null;
		characterSet = null;

		if (intent != null) {
			Log.d(MTAG, "in intent");
			String action = intent.getAction();
			String dataString = intent.getDataString();
			System.out.println(action + "====" + dataString);

			// if (Intents.Scan.ACTION.equals(action)) {
			// Log.d(MTAG, "IN Intents.Scan.ACTION");
			// // Scan the formats the intent requested, and return the result
			// to the calling activity.
			// source = IntentSource.NATIVE_APP_INTENT;
			// decodeFormats = DecodeFormatManager.parseDecodeFormats(intent);
			//
			// if (intent.hasExtra(Intents.Scan.WIDTH) &&
			// intent.hasExtra(Intents.Scan.HEIGHT)) {
			// int width = intent.getIntExtra(Intents.Scan.WIDTH, 0);
			// int height = intent.getIntExtra(Intents.Scan.HEIGHT, 0);
			// if (width > 0 && height > 0) {
			// cameraManager.setManualFramingRect(width, height);
			// }
			// }
			//
			// String customPromptMessage =
			// intent.getStringExtra(Intents.Scan.PROMPT_MESSAGE);
			// if (customPromptMessage != null) {
			// statusView.setText(customPromptMessage);
			// }
			//
			// } else if (dataString != null &&
			// dataString.contains(PRODUCT_SEARCH_URL_PREFIX) &&
			// dataString.contains(PRODUCT_SEARCH_URL_SUFFIX)) {
			// Log.d(MTAG, "in dataString != null");
			// // Scan only products and send the result to mobile Product
			// Search.
			// source = IntentSource.PRODUCT_SEARCH_LINK;
			// sourceUrl = dataString;
			// decodeFormats = DecodeFormatManager.PRODUCT_FORMATS;
			//
			// } else if (isZXingURL(dataString)) {
			//
			// // Scan formats requested in query string (all formats if none
			// specified).
			// // If a return URL is specified, send the results there.
			// Otherwise, handle it ourselves.
			// Log.d(MTAG, "inisZXingURL(dataString");
			// source = IntentSource.ZXING_LINK;
			// sourceUrl = dataString;
			// Uri inputUri = Uri.parse(sourceUrl);
			// returnUrlTemplate = inputUri.getQueryParameter(RETURN_URL_PARAM);
			// decodeFormats = DecodeFormatManager.parseDecodeFormats(inputUri);
			//
			// }

			characterSet = intent.getStringExtra(Intents.Scan.CHARACTER_SET);

		}
	}

	// private static boolean isZXingURL(String dataString) {
	// if (dataString == null) {
	// return false;
	// }
	// for (String url : ZXING_URLS) {
	// if (dataString.startsWith(url)) {
	// return true;
	// }
	// }
	// return false;
	// }

	@Override
	protected void onPause() {
		if (handler != null) {
			handler.quitSynchronously();
			handler = null;
		}
		inactivityTimer.onPause();
		cameraManager.closeDriver();
		if (!hasSurface) {
			SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
			SurfaceHolder surfaceHolder = surfaceView.getHolder();
			surfaceHolder.removeCallback(this);
		}
		super.onPause();
	}

	@Override
	protected void onDestroy() {
		inactivityTimer.shutdown();
		super.onDestroy();
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_BACK) {
			if (source == IntentSource.NATIVE_APP_INTENT) {
				setResult(RESULT_CANCELED);
				finish();
				return true;
			} else if ((source == IntentSource.NONE || source == IntentSource.ZXING_LINK)
					&& lastResult != null) {
				restartPreviewAfterDelay(0L);
				return true;
			}
		} else if (keyCode == KeyEvent.KEYCODE_FOCUS
				|| keyCode == KeyEvent.KEYCODE_CAMERA) {
			// Handle these events so they don't launch the Camera app
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		super.onCreateOptionsMenu(menu);
		// menu.add(Menu.NONE, SHARE_ID, Menu.NONE, R.string.menu_share)
		// .setIcon(android.R.drawable.ic_menu_share);
		menu.add(Menu.NONE, HISTORY_ID, Menu.NONE, R.string.menu_history)
				.setIcon(android.R.drawable.ic_menu_recent_history);
		// menu.add(Menu.NONE, SETTINGS_ID, Menu.NONE, R.string.menu_settings)
		// .setIcon(android.R.drawable.ic_menu_preferences);
		// menu.add(Menu.NONE, HELP_ID, Menu.NONE, R.string.menu_help)
		// .setIcon(android.R.drawable.ic_menu_help);
		// menu.add(Menu.NONE, ABOUT_ID, Menu.NONE, R.string.menu_about)
		// .setIcon(android.R.drawable.ic_menu_info_details);
		return true;
	}

	//
	// // Don't display the share menu item if the result overlay is showing.
	// @Override
	// public boolean onPrepareOptionsMenu(Menu menu) {
	// super.onPrepareOptionsMenu(menu);
	// menu.findItem(SHARE_ID).setVisible(lastResult == null);
	// return true;
	// }

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		Intent intent = new Intent(Intent.ACTION_VIEW);
		intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
		switch (item.getItemId()) {
		// case SHARE_ID:
		// intent.setClassName(this, ShareActivity.class.getName());
		// startActivity(intent);
		// break;
		case HISTORY_ID:
			intent = new Intent(Intent.ACTION_VIEW);
			intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
			intent.setClassName(this, HistoryActivity.class.getName());
			startActivityForResult(intent, HISTORY_REQUEST_CODE);
			break;
		// case SETTINGS_ID:
		// intent.setClassName(this, PreferencesActivity.class.getName());
		// startActivity(intent);
		// break;
		// case HELP_ID:
		// intent.setClassName(this, HelpActivity.class.getName());
		// startActivity(intent);
		// break;
		// case ABOUT_ID:
		// AlertDialog.Builder builder = new AlertDialog.Builder(this);
		// builder.setTitle(getString(R.string.title_about) + versionName);
		// builder.setMessage(getString(R.string.msg_about) + "\n\n" +
		// getString(R.string.zxing_url));
		// builder.setIcon(R.drawable.launcher_icon);
		// builder.setPositiveButton(R.string.button_open_browser,
		// aboutListener);
		// builder.setNegativeButton(R.string.button_cancel, null);
		// builder.show();
		// break;
		default:
			return super.onOptionsItemSelected(item);
		}
		return true;
	}

	@Override
	public void onActivityResult(int requestCode, int resultCode, Intent intent) {
		if (resultCode == RESULT_OK) {
			if (requestCode == HISTORY_REQUEST_CODE) {
				int itemNumber = intent.getIntExtra(
						Intents.History.ITEM_NUMBER, -1);
				if (itemNumber >= 0) {
					HistoryItem historyItem = historyManager
							.buildHistoryItem(itemNumber);
					decodeOrStoreSavedBitmap(null, historyItem.getResult());
				}
			}
		}
	}

	private void decodeOrStoreSavedBitmap(Bitmap bitmap, Result result) {
		// Bitmap isn't used yet -- will be used soon
		if (handler == null) {
			savedResultToShow = result;
		} else {
			if (result != null) {
				savedResultToShow = result;
			}
			if (savedResultToShow != null) {
				System.out.println("into");
				Message message = Message.obtain(handler,
						R.id.decode_succeeded, savedResultToShow);
				handler.sendMessage(message);
			}
			savedResultToShow = null;
		}
	}

	@Override
	public void surfaceCreated(SurfaceHolder holder) {
		if (holder == null) {
			Log.e(TAG,
					"*** WARNING *** surfaceCreated() gave us a null surface!");
		}
		if (!hasSurface) {
			hasSurface = true;
			initCamera(holder);
		}
	}

	@Override
	public void surfaceDestroyed(SurfaceHolder holder) {
		hasSurface = false;
	}

	@Override
	public void surfaceChanged(SurfaceHolder holder, int format, int width,
			int height) {

	}

	/**
	 * A valid barcode has been found, so give an indication of success and show
	 * the results.
	 * 
	 * @param rawResult
	 *            The contents of the barcode.
	 * @param barcode
	 *            A greyscale bitmap of the camera data which was decoded.
	 */
	public void handleDecode(Result rawResult, Bitmap barcode) {
		inactivityTimer.onActivity();
		lastResult = rawResult;
		ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(
				this, rawResult);
		historyManager.addHistoryItem(rawResult, resultHandler);

		if (barcode == null) {
			// This is from history -- no saved barcode
			handleDecodeInternally(rawResult, resultHandler, null);
		} else {
			beepManager.playBeepSoundAndVibrate();
			drawResultPoints(barcode, rawResult);
			switch (source) {
			case NATIVE_APP_INTENT:
			case PRODUCT_SEARCH_LINK:
				handleDecodeExternally(rawResult, resultHandler, barcode);
				break;
			case ZXING_LINK:
				if (returnUrlTemplate == null) {
					handleDecodeInternally(rawResult, resultHandler, barcode);
				} else {
					handleDecodeExternally(rawResult, resultHandler, barcode);
				}
				break;
			case NONE:
				PreferenceManager.getDefaultSharedPreferences(this);
				// if (prefs.getBoolean(PreferencesActivity.KEY_BULK_MODE,
				// false)) {
				if (tb_checked) {
					String message = getResources().getString(
							R.string.msg_bulk_mode_scanned)
							+ " (" + rawResult.getText() + ')';
					Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
					// Wait a moment or else it will scan the same barcode
					// continuously
					// about
					// 3 times
					restartPreviewAfterDelay(BULK_MODE_SCAN_DELAY_MS);
				} else {
					handleDecodeInternally(rawResult, resultHandler, barcode);
				}
				break;
			}
		}
	}

	/**
	 * Superimpose a line for 1D or dots for 2D to highlight the key features of
	 * the barcode.
	 * 
	 * @param barcode
	 *            A bitmap of the captured image.
	 * @param rawResult
	 *            The decoded results which contains the points to draw.
	 */
	private void drawResultPoints(Bitmap barcode, Result rawResult) {
		ResultPoint[] points = rawResult.getResultPoints();
		if (points != null && points.length > 0) {
			Canvas canvas = new Canvas(barcode);
			Paint paint = new Paint();
			paint.setColor(getResources().getColor(R.color.result_image_border));
			paint.setStrokeWidth(3.0f);
			paint.setStyle(Paint.Style.STROKE);
			Rect border = new Rect(2, 2, barcode.getWidth() - 2,
					barcode.getHeight() - 2);
			canvas.drawRect(border, paint);

			paint.setColor(getResources().getColor(R.color.result_points));
			if (points.length == 2) {
				paint.setStrokeWidth(4.0f);
				drawLine(canvas, paint, points[0], points[1]);
			} else if (points.length == 4
					&& (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A || rawResult
							.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
				// Hacky special case -- draw two lines, for the barcode and
				// metadata
				drawLine(canvas, paint, points[0], points[1]);
				drawLine(canvas, paint, points[2], points[3]);
			} else {
				paint.setStrokeWidth(10.0f);
				for (ResultPoint point : points) {
					canvas.drawPoint(point.getX(), point.getY(), paint);
				}
			}
		}
	}

	private static void drawLine(Canvas canvas, Paint paint, ResultPoint a,
			ResultPoint b) {
		canvas.drawLine(a.getX(), a.getY(), b.getX(), b.getY(), paint);
	}

	// Put up our own UI for how to handle the decoded contents.
	private void handleDecodeInternally(Result rawResult,
			ResultHandler resultHandler, Bitmap barcode) {
		statusView.setVisibility(View.GONE);
		viewfinderView.setVisibility(View.GONE);
		resultView.setVisibility(View.VISIBLE);

		ImageView barcodeImageView = (ImageView) findViewById(R.id.barcode_image_view);
		if (barcode == null) {
			barcodeImageView.setImageBitmap(BitmapFactory.decodeResource(
					getResources(), R.drawable.launcher_icon));
		} else {
			barcodeImageView.setImageBitmap(barcode);
		}

		TextView formatTextView = (TextView) findViewById(R.id.format_text_view);
		formatTextView.setText(rawResult.getBarcodeFormat().toString());

		TextView typeTextView = (TextView) findViewById(R.id.type_text_view);
		typeTextView.setText(resultHandler.getType().toString());

		DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.SHORT,
				DateFormat.SHORT);
		String formattedTime = formatter.format(new Date(rawResult
				.getTimestamp()));
		TextView timeTextView = (TextView) findViewById(R.id.time_text_view);
		timeTextView.setText(formattedTime);

		TextView metaTextView = (TextView) findViewById(R.id.meta_text_view);
		View metaTextViewLabel = findViewById(R.id.meta_text_view_label);
		metaTextView.setVisibility(View.GONE);
		metaTextViewLabel.setVisibility(View.GONE);
		Map<ResultMetadataType, Object> metadata = rawResult
				.getResultMetadata();
		if (metadata != null) {
			StringBuilder metadataText = new StringBuilder(20);
			for (Map.Entry<ResultMetadataType, Object> entry : metadata
					.entrySet()) {
				if (DISPLAYABLE_METADATA_TYPES.contains(entry.getKey())) {
					metadataText.append(entry.getValue()).append('\n');
				}
			}
			if (metadataText.length() > 0) {
				metadataText.setLength(metadataText.length() - 1);
				metaTextView.setText(metadataText);
				metaTextView.setVisibility(View.VISIBLE);
				metaTextViewLabel.setVisibility(View.VISIBLE);
			}
		}

		TextView contentsTextView = (TextView) findViewById(R.id.contents_text_view);
		CharSequence displayContents = resultHandler.getDisplayContents();
		contentsTextView.setText(displayContents);
		// Crudely scale betweeen 22 and 32 -- bigger font for shorter text
		int scaledSize = Math.max(22, 32 - displayContents.length() / 4);
		contentsTextView.setTextSize(TypedValue.COMPLEX_UNIT_SP, scaledSize);

		// TextView supplementTextView = (TextView)
		// findViewById(R.id.contents_supplement_text_view);
		// supplementTextView.setText("");
		// supplementTextView.setOnClickListener(null);
		// if (PreferenceManager.getDefaultSharedPreferences(this).getBoolean(
		// PreferencesActivity.KEY_SUPPLEMENTAL, true)) {
		// SupplementalInfoRetriever.maybeInvokeRetrieval(supplementTextView,
		// resultHandler.getResult(), handler, historyManager, this);
		// }
		//
		// int buttonCount = resultHandler.getButtonCount();
		// ViewGroup buttonView = (ViewGroup)
		// findViewById(R.id.result_button_view);
		// buttonView.requestFocus();
		// for (int x = 0; x < ResultHandler.MAX_BUTTON_COUNT; x++) {
		// TextView button = (TextView) buttonView.getChildAt(x);
		// if (x < buttonCount) {
		// button.setVisibility(View.VISIBLE);
		// button.setText(resultHandler.getButtonText(x));
		// button.setOnClickListener(new ResultButtonListener(
		// resultHandler, x));
		// } else {
		// button.setVisibility(View.GONE);
		// }
		// }

		// if (copyToClipboard && !resultHandler.areContentsSecure()) {
		// ClipboardManager clipboard = (ClipboardManager)
		// getSystemService(CLIPBOARD_SERVICE);
		// clipboard.setText(displayContents);
		// }
	}

	// Briefly show the contents of the barcode, then handle the result outside
	// Barcode Scanner.
	private void handleDecodeExternally(Result rawResult,
			ResultHandler resultHandler, Bitmap barcode) {
		viewfinderView.drawResultBitmap(barcode);

		// Since this message will only be shown for a second, just tell the
		// user
		// what kind of
		// barcode was found (e.g. contact info) rather than the full contents,
		// which they won't
		// have time to read.
		statusView.setText(getString(resultHandler.getDisplayTitle()));

		if (copyToClipboard && !resultHandler.areContentsSecure()) {
			ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
			clipboard.setText(resultHandler.getDisplayContents());
		}

		if (source == IntentSource.NATIVE_APP_INTENT) {

			// Hand back whatever action they requested - this can be changed to
			// Intents.Scan.ACTION when
			// the deprecated intent is retired.
			Intent intent = new Intent(getIntent().getAction());
			intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
			intent.putExtra(Intents.Scan.RESULT, rawResult.toString());
			intent.putExtra(Intents.Scan.RESULT_FORMAT, rawResult
					.getBarcodeFormat().toString());
			byte[] rawBytes = rawResult.getRawBytes();
			if (rawBytes != null && rawBytes.length > 0) {
				intent.putExtra(Intents.Scan.RESULT_BYTES, rawBytes);
			}
			Map<ResultMetadataType, ?> metadata = rawResult.getResultMetadata();
			if (metadata != null) {
				if (metadata.containsKey(ResultMetadataType.UPC_EAN_EXTENSION)) {
					intent.putExtra(Intents.Scan.RESULT_UPC_EAN_EXTENSION,
							metadata.get(ResultMetadataType.UPC_EAN_EXTENSION)
									.toString());
				}
				Integer orientation = (Integer) metadata
						.get(ResultMetadataType.ORIENTATION);
				if (orientation != null) {
					intent.putExtra(Intents.Scan.RESULT_ORIENTATION,
							orientation.intValue());
				}
				String ecLevel = (String) metadata
						.get(ResultMetadataType.ERROR_CORRECTION_LEVEL);
				if (ecLevel != null) {
					intent.putExtra(Intents.Scan.RESULT_ERROR_CORRECTION_LEVEL,
							ecLevel);
				}
				Iterable<byte[]> byteSegments = (Iterable<byte[]>) metadata
						.get(ResultMetadataType.BYTE_SEGMENTS);
				if (byteSegments != null) {
					int i = 0;
					for (byte[] byteSegment : byteSegments) {
						intent.putExtra(
								Intents.Scan.RESULT_BYTE_SEGMENTS_PREFIX + i,
								byteSegment);
						i++;
					}
				}
			}
			sendReplyMessage(R.id.return_scan_result, intent);

		} else if (source == IntentSource.PRODUCT_SEARCH_LINK) {

			// Reformulate the URL which triggered us into a query, so that the
			// request goes to the same
			// TLD as the scan URL.
			int end = sourceUrl.lastIndexOf("/scan");
			String replyURL = sourceUrl.substring(0, end) + "?q="
					+ resultHandler.getDisplayContents() + "&source=zxing";
			sendReplyMessage(R.id.launch_product_query, replyURL);

		} else if (source == IntentSource.ZXING_LINK) {

			// Replace each occurrence of RETURN_CODE_PLACEHOLDER in the
			// returnUrlTemplate
			// with the scanned code. This allows both queries and REST-style
			// URLs to
			// work.
			if (returnUrlTemplate != null) {
				String codeReplacement = String.valueOf(resultHandler
						.getDisplayContents());
				try {
					codeReplacement = URLEncoder.encode(codeReplacement,
							"UTF-8");
				} catch (UnsupportedEncodingException e) {
					// can't happen; UTF-8 is always supported. Continue, I
					// guess, without
					// encoding
				}
				String replyURL = returnUrlTemplate.replace(
						RETURN_CODE_PLACEHOLDER, codeReplacement);
				sendReplyMessage(R.id.launch_product_query, replyURL);
			}

		}
	}

	private void sendReplyMessage(int id, Object arg) {
		Message message = Message.obtain(handler, id, arg);
		long resultDurationMS = getIntent().getLongExtra(
				Intents.Scan.RESULT_DISPLAY_DURATION_MS,
				DEFAULT_INTENT_RESULT_DURATION_MS);
		if (resultDurationMS > 0L) {
			handler.sendMessageDelayed(message, resultDurationMS);
		} else {
			handler.sendMessage(message);
		}
	}

	/**
	 * We want the help screen to be shown automatically the first time a new
	 * version of the app is run. The easiest way to do this is to check
	 * android:versionCode from the manifest, and compare it to a value stored
	 * as a preference.
	 */
	// private boolean showHelpOnFirstLaunch() {
	// try {
	// PackageInfo info = getPackageManager().getPackageInfo(PACKAGE_NAME, 0);
	// int currentVersion = info.versionCode;
	// // Since we're paying to talk to the PackageManager anyway, it makes
	// sense to cache the app
	// // version name here for display in the about box later.
	// this.versionName = info.versionName;
	// SharedPreferences prefs =
	// PreferenceManager.getDefaultSharedPreferences(this);
	// int lastVersion =
	// prefs.getInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, 0);
	// if (currentVersion > lastVersion) {
	// prefs.edit().putInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN,
	// currentVersion).commit();
	// Intent intent = new Intent(this, HelpActivity.class);
	// intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
	// // Show the default page on a clean install, and the what's new page on
	// an upgrade.
	// String page = lastVersion == 0 ? HelpActivity.DEFAULT_PAGE :
	// HelpActivity.WHATS_NEW_PAGE;
	// intent.putExtra(HelpActivity.REQUESTED_PAGE_KEY, page);
	// startActivity(intent);
	// return true;
	// }
	// } catch (PackageManager.NameNotFoundException e) {
	// Log.w(TAG, e);
	// }
	// return false;
	// }

	private void initCamera(SurfaceHolder surfaceHolder) {
		try {
			cameraManager.openDriver(surfaceHolder);
			// Creating the handler starts the preview, which can also throw a
			// RuntimeException.
			if (handler == null) {
				handler = new CaptureActivityHandler(this, decodeFormats,
						characterSet, cameraManager);
			}
			decodeOrStoreSavedBitmap(null, null);
		} catch (IOException ioe) {
			Log.w(TAG, ioe);
			displayFrameworkBugMessageAndExit();
		} catch (RuntimeException e) {
			// Barcode Scanner has seen crashes in the wild of this variety:
			// java.?lang.?RuntimeException: Fail to connect to camera service
			Log.w(TAG, "Unexpected error initializing camera", e);
			displayFrameworkBugMessageAndExit();
		}
	}

	private void displayFrameworkBugMessageAndExit() {
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setTitle(getString(R.string.app_name));
		builder.setMessage(getString(R.string.msg_camera_framework_bug));
		builder.setPositiveButton(R.string.button_ok, new FinishListener(this));
		builder.setOnCancelListener(new FinishListener(this));
		builder.show();
	}

	public void restartPreviewAfterDelay(long delayMS) {
		if (handler != null) {
			handler.sendEmptyMessageDelayed(R.id.restart_preview, delayMS);
		}
		resetStatusView();
	}

	private void resetStatusView() {

		resultView.setVisibility(View.GONE);
		statusView.setText(R.string.msg_default_status);
		statusView.setVisibility(View.VISIBLE);
		viewfinderView.setVisibility(View.VISIBLE);
		tb.setVisibility(View.VISIBLE);
		lastResult = null;
	}

	public void drawViewfinder() {
		viewfinderView.drawViewfinder();
	}
}
